<script type="text/javascript">
$(document).ready(function(){
    $("#user_name").focus();
});
</script>
<form action="<?php echo url_for('@login'); ?>" method="post" autocomplete="off">
<table style="margin: 0 auto; margin-top: 40px;">
    <tr>
        <td>Usuario</td>
        <td><input type="text" id="user_name" name="user_name" /></td>
    </tr>
    <tr>
        <td>Password</td>
        <td><input type="password" id="password" name="password" /></td>
    </tr>
    <tr>
        <td colspan="2" align="center">
            <input type="submit" value="Entrar" />
        </td>
    </tr>
</table>
</form>